如何將標籤添加到情節

Question

我有核心繪圖表是這樣的：

graph http://img413.imageshack.us/img413/8347/img0157h.jpg

我怎樣才能標籤添加到每個這些地塊。我已經看到了一些關於向圖中添加CPTextLayer的參考，但無法弄清楚如何去做。有人能指點我嗎？

Answer 1

我能三個標籤添加到圖形像這樣的頂部：

CPTextStyle *textStyle1 = [CPTextStyle textStyle]; 
textStyle1.color = [CPColor blueColor]; 
textStyle1.fontSize = 14; 
CPTextStyle *textStyle2 = [CPTextStyle textStyle]; 
textStyle2.color = [CPColor greenColor]; 
textStyle2.fontSize = 14; 
CPTextStyle *textStyle3 = [CPTextStyle textStyle]; 
textStyle3.color = [CPColor redColor]; 
textStyle3.fontSize = 14; 

CPTextLayer *layer1 = [[[CPTextLayer alloc] initWithText:[NSString stringWithFormat:@"text1"]] autorelease]; 
CPTextLayer *layer2 = [[[CPTextLayer alloc] initWithText:[NSString stringWithFormat:@"text2"]] autorelease]; 
CPTextLayer *layer3 = [[[CPTextLayer alloc] initWithText:[NSString stringWithFormat:@"text3"]] autorelease]; 
layer1.bounds = CGRectMake(-75,2,20,10); 
layer1.textStyle = textStyle1; 
layer2.bounds = CGRectMake(-130,2, 20,10); 
layer2.textStyle = textStyle2; 
layer3.bounds = CGRectMake(-190,2, 20,10); 
layer3.textStyle = textStyle3; 

CPLayerHostingView * newView = [[CPLayerHostingView alloc]initWithFrame:[[UIScreen mainScreen] applicationFrame]]; 
newView.hostedLayer = graph; 
NSInteger count = [graph.sublayers count]; 
[graph insertSublayer:layer1 atIndex: count + 1]; 
[graph insertSublayer:layer2 atIndex: count + 2]; 
[graph insertSublayer:layer3 atIndex: count + 3]; 
self.view = newView; 
[newView release];